Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Laser Pointer Store

Pressure Switch power loss??

GSS

Well-known member
Joined
Apr 28, 2015
Messages
3,938
Points
113

I can't seem to find the thread where someone wanted a remote pressure switch but came across one from survival lasers and
did not know using one can rob up to 15% of the optical power from the laser??
Is it a typo?
 

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
14,574
Points
113
That makes no sense as it is used to disconnect the battery supply for the driver. Even if it has some resistance which would drop some voltage across it, the driver should keep the current constant until it reaches a critical value. I have never looked at these before now, not even needing one for my applications. Still, it is just a switching mechanism for the supply to the driver.
 

RedCowboy

Well-known member
LPF Site Supporter
Joined
Jul 10, 2015
Messages
7,448
Points
113
If you don't press firmly it could add enough resistance that your driver Vin falls below dropout, I have seen this with pressure switches when connected to incandescent light bulbs as a dimly lit bulb, momentary contact switches too. Try pressing firmly and see if it changes.
 




Top